Electromagnetic valve.



PATENTED NOV. l5, 1904.

I. G. WATERMAN. ELEGTROMAGNBTIG VALVE.

APPLICATION FILED MAB.. 9. 1903. RENEWED DEO. 24. 1903.

2 SHEETS-SHEET 1.

H0 MODEL.

PATENTED Nov. 15, 1904.

' I. G. WATERMAN.

ELBGTROMAGNETIC VALVE.

. A BPLIGATIoN FILED MAB. 9. 190s. RBNBWBD DEG. 24, 1903.I

2 SHEETS-SHEET 2.

4H0 MODEL.

' www@ UNITED STATES Patented November 15, 1904.

PATENT OFFICE.

`ELEOTFOMAGNETIC VALVE.

SPECIFICATION forming part of Letters Patent No. 775,054, datedNovember15, 1904.

Application filed March 9, 1903. Renewed December 24, 1903. Serial No.186,507. (No model.)

To @ZZ whom, it may concern:

Be it known that I, ISAAC Gr. WATERMAN, a citizen of the United States,residing at Santa Barbara, in the county of Santa Barbara and State ofCalifornia, have invented certain new and useful Improvements inElectromagnetic Valves, of which the following is a specication.

My invention relates to electromagnetic valves.

The Ypresent invention is designed as an improvement on theelectromagnetic valves set forth in my copending applications, filedJune 24:, 1902, Serial No. 113.002, and led June 24, 1902, Serial No.113,003, and has for its object the provision of improved and novelmeansfor locking the valve inopen position when opened by the electromagneticaction and for electromagnetically releasing the valve to permitclosing. thereof Awhen desired. In my copending applications aforesaid,it

is necessary, in order to hold the valvevopen, to maintain a current inthe coil, for on the cessation of the current the valve closes 'bygravity. The continuance of a current in the coil for'some time causesheating effects which are prejudicial to the coil; and the purpose ofthe present invention is to provide means for automatically locking orsecuring the valve after it has been opened by sending a current throughvthe coil, thereby obviating the necessity of maintaining a current inthe coil, and to make provision for electromagnetically releasing thevalve to allow it to seat itself.

To accomplish the foregoing objects, I provide certain improvements andnovel combinations, set forth in detail hereinafter and recited in theappended claims.

In the accompanying drawings, Figure 1 is a vertical section showing thevalve raised and locked; Fig. 2, a similar view` showing the valveclosed; Fig. 3, a side elevation; Fig. 4, a perspective detail of thecoil; Fig. 5, a detail ofthe locking-core, spring, and screw.

The valve-casing 1, shell 2 rising therefrom, the magnet 3, and the coreor 'armature 4, connected tothe valve 5, are, by preference, of,

substantiallythe same construction as fully shown and described in mycopending applicatlons heretofore referred togvbut to insure perfect andquick seating of the valve I prefer to employ a pressure-spring 6 withinthe shell 2 and bearing on the upper end of the vention I provide anannular groove 7 on the core, which defines a shoulder 8.

Projecting laterally from the lower portion ings, if desired, or byfrictional contact only. 'The shell 14 increases the magnetic action ofthe coil 11, according to lwell-known principles. The wires 16 fromthecoil are led out Vcore 4, and for the purposes of the presentinthrough suitable openings in the end of the shell 14.

Movablel Within the tube 9`is a core or armature 17, whose end ispositioned to project into the groove 7 and engage the shoulder 8 andhold thevalve raised off its seat after the core 1 has been drawnupwardly on sending a current through the coil or magnet 3. Toaccomplish the projection-of the core 17 for this purpose, I provide aspring 18. interposed between the end of the core 17, and a screw 19,which is threaded into the end of the tube 9. The head of the screw 19bears on the outer head of the coil and keeps vit on tube 9.

The wires of the coil or magnet 3 can be included in any suitableelectric circuit and the Wires of coil 11 in any other suitable electriccircuit, and in this connection I have invented an improved switch,forming the subject-'matter of an application filed of even dateherewith, which is adapted to iirst send a temporary current'through thecoil, and af terward at option to be manipulated to send a currentthrough coil 11 to retract the core 17 and permit the valve to close.

A temporary current of electricity having been sent through coil 3- thecorea is attracted and the valve opened, whereupon the core 17 isprojected by its spring into engagement IOO with shoulder 8, and thoughthecurrent in coil 3 has ceased the corell is held up and theV valve isopen. Whenever a current of electricity is sent through coil 11, thecore 17 is retracted, and the core 4 and valve drop, assisted by thepressure of spring 6. Thus it becomes unnecessary to maintain a currentin coilB in order to keep the valve open, and I thereby avoid injuriousheating effects.

The present invention is intended for use in any'connection where such adevice would be serviceable.l but is particularly designed as a valvefor controlling the water-supply to lavatories, bath-tubs, and hot-waterradiators, and thesteam-supply to steam-radiators.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In an electromagnetic valve, the combinationwith a hollowelectromagnet-coil, a core or armature adapted to be drawn into saidcoil, and a valve operated by said core, of a hollow electromagnet-coil,and a spring-pressed core or armature therein adapted to automatlcallylock the valve in open position.

2. In an electromagnetic valve, the combination with a valve-casing. ofa'valve and a slidable magnet-core, a magnet-coil for attracting thecore'` al slidable locking-core disposed substantially at rightangles tothe magnet-core aforesaid, and adapted to automatically engage the same,and a magnet-coil for retracti ng said locking-core.

3. The combination with an electromagnetvically-opened valve, and avalve-casing, of a tube secured to the val ve-casing, a core movable inthe tube, a coil on said tube, and a spring interposed between the endof the tube i and the core, said core being adapted to lock the valve.

v 4. The combination with an electromagnetically-opened valve, and avalve-casing, of a diskV or seat on the valve-casing, a tube secured tothe valve-casing, a coil on the tube, a shell over the coil and bearingagainst the disk or seata core in the tube adapted to 'lock the Valve, ascrew in the ond of the tube Land holding the coil on the tube, and aspring interposed between the screw and the core.

In testimony whereof-l have signed my name to this specication inpresence of two witnesses. l

ISAAC G. WATERMAN. Witnesses:

E. S. PILLARD, P. M. HAMMOND.

